Citation: LI Biao, ZHANG Hong-Yan, ZHENG Jia-Jun, QIN Bo, PAN Meng, CHEN Jia-Qi, YU Feng, WANG Guang-Shuai, LI Rui-Feng. Bi-phase Zeolites Composite MFI/BEA: Synthesis and Application in Selective Catalytic Reduction of NO_x by Methane[J]. Chinese Journal of Inorganic Chemistry, ;2015, 31(8): 1563-1570. doi: 10.11862/CJIC.2015.206 shu

Bi-phase Zeolites Composite MFI/BEA: Synthesis and Application in Selective Catalytic Reduction of NO_x by Methane

LI Biao ¹ ,
ZHANG Hong-Yan ¹ ,
ZHENG Jia-Jun ^1,, ,
QIN Bo ² ,
PAN Meng ¹ ,
CHEN Jia-Qi ¹ ,
YU Feng ^1,, ,
WANG Guang-Shuai ¹ ,
LI Rui-Feng ¹

1.
1. Research Centre of Energy Chemical & Catalytic Technology, Taiyuan University of Technology, Taiyuan 030024, China;
2.
2. Fushun Research Institute of Petroleum and Petrochemicals, SINOPEC, Fushun, Liaoning 113001, China

Corresponding author: ZHENG Jia-Jun, YU Feng,
Received Date: 22 April 2015
Available Online: 18 June 2015
Fund Project: 国家自然科学基金委-中石化联合基金(No.U1463209) (No.U1463209)

Zeolite-zeolite composites composed of ZSM-5 and β zeolite crystals were synthesized by a two-step hydrothermal crystallization procedure (denoted as MFI/BEA), in which the mixture of pre-synthesized β zeolite was used as the nutrients for the growth of the post-synthesized ZSM-5 zeolite. The structural, crystalline, and textural properties of the as-synthesized materials, as well as the references ZSM-5 and β zeolite samples, were characterized by XRD, FTIR, in situ pyridine IR spectroscopy, NH₃-TPD, nitrogen adsorption/desorption, TEM and SEM. The results displayed that the post-synthesized ZSM-5 zeolite unexpectedly grew within the β zeolite crystals, and the ratios of MFI/BEA in the as-synthesized zeolite-zeolite composites could be adjusted by controlling the second-step crystalline time. Catalytic performances of Co-β, Co-ZSM-5 and Co-MFI/BEA were investigated during the catalytic reduction of NO by methane in the presence of O₂. As compared with the references Co-β and Co-ZSM-5, the zeolite-zeolite composites Co-MFI/BEA exhibited an excellent catalytic performance with a higher activity as well as a higher stability and an excellent sulfur-resistance.
- ZSM-5;zeolite composite;reversed crystal growth;de-NO_x
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沈阳化工大学材料科学与工程学院沈阳 110142

Bi-phase Zeolites Composite MFI/BEA: Synthesis and Application in Selective Catalytic Reduction of NOx by Methane

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通讯作者: 陈斌, bchen63@163.com

Bi-phase Zeolites Composite MFI/BEA: Synthesis and Application in Selective Catalytic Reduction of NO_x by Methane